Pawaris Petchan และ Singhanat Nomnian. (2012) English language speaking anxiety of thai visually impaired female students at a rehabilitation and vocational training center for blind women. Mahidol University:ม.ป.ท.Pawaris Petchan และ Singhanat Nomnian. 2012. English language speaking anxiety of thai visually impaired female students at a rehabilitation and vocational training center for blind women. ม.ป.ท.:Mahidol University;Pawaris Petchan และ Singhanat Nomnian. English language speaking anxiety of thai visually impaired female students at a rehabilitation and vocational training center for blind women. ม.ป.ท.:Mahidol University, 2012. Print.